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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f351a4e914d30fc762a85c5e5958eed9efa60c2d17a98c1626813214114e0a3' 
  AND token = 'acnxtZJ00yk9t5YbeOLFvaR5QrIpl1cM0Y5E+qVJggY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}